| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $30,334 | $19,225 |
| 2016 | $31,170 | $19,865 |
| 2017 | $32,028 | $21,183 |
| 2018 | $32,028 | $20,102 |
| 2019 | $35,210 | $21,514 |
| 2020 | $36,326 | $22,630 |
| 2021* | $37,329 | $23,804 |
| 2022* | $38,359 | $25,040 |
| 2023* | $39,418 | $26,340 |
| 2024* | $40,505 | $27,707 |
| 2025* | $41,623 | $29,145 |